Concrete-mold construction



G. SWENSON.

CONCRETE MOLD CONSTRUCIION. APPLxcATloN FILED MAR.16,192|.

1,388,904. Patented Aug 30, 1921.

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Sum/nto@ G. swENsoN. CONCRETE MOLD CONSTRUCTION. l

APPLICATION FILED MAR. I5. 192|.

Patented Aug. 30; 1921.

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sembling of the mold. The overlapping UNITED STATES y GUSTAV SWENSON, 0F NEW YORK,

PATENT OFFICE.

CONCRETE-MOLD CONSTRUCTION.

To @ZZ whom 'it may concern: A

Be it known that I. GUsrAv SwENsoNa citizen of the United States, residing in the city, county, and State of New York, have invented an Improvement in Concrete-Mold Construction, of which the following is a specification. y

This invention relates to concrete mold construction and more particularly to improvements in means for adjustably clampinfr the molds into the desired form.V

ne of the objects of the invention is to provide readily adjustable and detachable means for locking together two members which meet at an angle. A further object is to apply this locking means to clamps which may be used to hold concrete molds in their desired shape. The molds are preferably surrounded by angular retaining members, their ends overlapping suficiently to give the desired size and the locking members applied to these ends to fix them firmly toy gether. When angular retaining members are used, at least one-half of the angles are valways xed and, in the case of square col umns, it will merely be necessary to adjust one angle. This greatly lfacilitates the asends permit wide variations in size, since the angular retaining members may be made considerably larger than particular mold. y

Another object of this invention is to provide a simple and practical means for assembling concrete molds for columns, beams, pilasters, etc., that can be readily disassembled when it is desired to transfer the mold to another part of the building; to also provide a mold that is made up of relatively required for the light parts, that may be readily moved fromv one part of the building to another.

This invention aims to eliminate the difficulties encountered in the presentmeans of construction by constructing angular retaining members of a standard design and by applying a readily adjustable and detachable locking means to the ends of these members. In the case of square columns, twoof the angles are fixed and it becomes comparatively easy, therefore, to fix the other angle.

These clamping members are readily adaptable to molds of various sizes and they com-A bine lightness with facility of operation and eliminate the .necessity of the 'inefficient means heretofore used. It will bereadily Specicaton of Letters iatent. Patented Aug', Application filed March 16, 1921. Serial No. 452,i80.

seen that the application of an improved clamping device of the character described, where the moldsare used repeatedly, will result in speeding up the work and decreas-v ing the amount of labor required.

Other objects will be in part-obvious ory in part pointed out hereinafter.

In the accompanying drawings in which is shown one embodiment of this invention by way of example and in which similar reference characters refer to similar parts throughout,

Figure 1 is a perspective, showing the improved clamping means as applied to square column molds,

Fig. 2 is an end elevation of the device as applied to beams, pilasters, etc.,

Fig. 3 is an end view of a hexagonal column mold as held in place by the improved clamping means,

Fig. L1 is an end view showing a method of holding the outer side of a mold in an-upright position,

Fig.v 5 isan end view' of a beam or a pilaster showing the application of an angular retaining member, V

Fig. 6 is a detailed perspective showing the construction and application of the improved locking means, and v b Fig. 7 shows another form of the tie mem'- Referring more particularly to Fig.` 1, 10 designates the mold forming members, which may be ordinary boards of suitable dimensions for the mold. When it is desired to increase or decrease the size of the mold,4 it is merely necessary to change the number or size of the mold forming members accordingly.A The angular retaining members 11 are made of any ordinary metal-of suiicient-strength to perform their function and are providedat each of their ends with a series of notches or seats 12, coperating with the tie member 13, and key 14 to clamp the mold forming members in position. The tie member 13 as more fully `shown in Figs. 6 and 7,consists of a pair offlegs 15 formed by the slot 16. i

These legs are bent at their free ends into the abutments 17 and hooks 18 which receive the key 14. It will be seen from Athe figures i 141 and are thus firmly locked together against any outward stresses exerted by the members 10. By choosing different seats to be engaged by the tie member, relatively large adjustments in size may be obtained. Since the key 1d is tapered sufficiently to permit small adjustments which cannot be made by going from one seat to another, delicate adjustment-s may be made for any change in size. To secure the best results, the key should be tapered enough to give a maximum adjustment by the key equal to or greater than that given by moving the tie member the distance o'f one seat. It is also to be noted here that since two of the angles are fixed, it is only necessary to adjust one other angle.

Fig. 3 shows the invention as applied to a hexagonal mold in which the outer angular retaining members 11 have an angle of 120o instead or" 90, as in the case of a square column. of any shape may be constructed by providing the proper shaped angular retaining members. In the instance of :r mold with an odd number of sides, it is necessary to have one straight member to replace an angular retaining member 11. Since molds are usually in the form of rectangles, squares or other regular polygons, the angular retaining members 11 may be manufactured from a standard design and be adaptable to molds of various sizes, thus eliminating special clamps or yokes for the various molds used throughout the building.

Referring to Figs. 2 and 5, wherein the invention is shown as applied to beams and pilasters, which are integral with a concrete floor or wall, in these figures the beams and pilasters 'are shown as rectangular, merely for conveniente. They obviously may be in many other forms. In Fig. 2, a pair ot straightmembers are fixed in any desired manner, as by the fianges 23 and bolts 2&1 to the wall or floor molds The 'free ends of the members 22 are provided with the usual seats 12 and connect-ed by the straight member 25. This member is likewise provided withthe usual seats and has each of its ends locked to one ofthe members 22 `by the tie members 13, hereinbefore de-` sfribed. Fig. 5 shows the straight Vmember 25 and one of the members 22 replaced by the angular retaining member 27. Fewer parts are required for this method `of construction, but it requires screw adjustment between the angular retaining member 27 and the wall 26, while in the otherfronstruction all the Aadjustments may be made through the tie membersl. Thisscrew adjustment can be accomplished inany desired manner, as by having the Vend 28 of the angular retaining :member threaded an amount suflicient Vt0 take care oi the necessary variations in size and .provided with a washer 29 and a It is obvious from this that a moldv nut 30. This form permits the use of one angular retaining member, thereby fixing one angle ofthe pilaster or beam and'facilitating the adjustment in shape, as hereinbefore noted.

n the construction of buildings, applications for inverted retaining members to withstand longitudinal stresses are quite frequently found. A typical example of this is shown in Fig. 1 where it is desired to retain the member 31 in an uprigl'it position. To do this the member 32 is extended beyond the mold and provided with theseats 12 and the pin 33 as shown. A member 311 provided with the serrations 37 to prevent slipping is connected through the joint d5 to the inverted member 3G which has a series of seats 12 along its free end. The free end of the inverted retaining member 3G rests upon the pin 33 and is locked by the tie member 13 and the key 14 to the member 32, to resist the longitudinal stress in the inverted member 36 set up by the member 31. Thus it will kbe seen that the invention is readily adaptable to the resisting of longitudinal as well as transverse stresses as hereinbeiore described. v

Fig. 7 shows another illustrated embodiment of the tie member 13. Its operation is the same as that shown in Fig. 6, its construction being such as `to embody greater strength. A slot 38 is preferably punched in a flat piece of metal, the slot being closed bythe ends 39. These ends are then bent together, as shown, to form the abutments 40 and the legs 11. The bending together of the ends 39 also forms the loop f1() in which vthe key 14; may be sea-ted, instead of in the hooks 18, as shown in the other embodiment. It will be seen from a comparison of the tie members of Figs. 6 and 7, that to cause the embodiment in Figf to release its hold, it is necessary for the hooks 18 to give way. In the'loop structure, it is necessary that a pair of the legs 41 break; This formV is Vparticularly adaptable where great strength is required. is -found that the tie member provided with hooks is the easier to construct and, under ordinary conditions, it is suiiiciently strong to perform its function. Each has its field of application as hereinbefore noted.

It will be seen that the above locking and clamping means may be easily manutan either delicate or rough adjustments and lthe two may be combined to give a very precise `adjustment withv any" change in size. The device combines strength-With lightness However, it

and permits quick lixing or removal of the clamping means when the mold is being constructed or detached'. It will be noted, therefore, that there is provided in this invention, a structure of simple and inexpensive construction and highly efficient action.

As various embodiments may be made in the invention above set forth, and as many changes may be made in the structure hereinbei'ore described, it is to be understood that all matter herein set forth is to be interpreted as illustrative and not in a limiting sense.

I claim as my invention l. In a construction of the class described, in combination, a plurality of mold forming members, a plurality of retaining members, a series of seats on each of said retaining members, a tie member having one end adapted to engage a seat on one of said members and having the other end in the form of a seat, a tapered key coperating with said seat on said tie member and a seat on one of said retaining members to hold the two of said retaining members together.

2. In a construction of the class described, in combination, a plurality of mold forming members, a plurality of members serrated at their outer edges, a tie member having one end adapted to engagesaid serrated portions of one of said members and having the other end in the form of a seat, a tapered key adapted to fit into said seat and to engage the serrated portions of another of said members to hold the two of said members together.

3. In a construction oi the class described, in combination, a plurality of mold forming members, a plurality of angular retaining members provided with serrated portions on the outer edges and near the ends of said angular retaining members, a tie member having one end adapted to engage a serrated portion of one of said angular retaining members and having the other end of said tie member in the form of a seat, a key adapted to coperate with said seat and a serrated portion or another of said retaining members to hold the two of said angular retaining members together.

4. In a construction of the class described, in combination, a plurality of mold forming members, a pair of angular retaining members, a series of seats on each of saidlangular retaining members, a tie member slotted to receive the ends of said pair of angular retaining members between the legs formed by said slot, and adapted to engage a selected seat on one of said angular retaining members, means integral with said legs forming a pair of abutments, one on each of said legs, and a tapered key adapted to be seated between said abutments and a selected seat on the other of said retaining members to lock the ends of said retaining members together;

5. In a construction of the class described, in combination a plurality of mold forming members, a pair of members, a series of seats on each of said members, a tie member slotted to receive the ends of a pair of said mem bers, between the legs formed'by said slot, said tie member engaging the selected seat on one of said members, means integral with said legs forming a pair of abutments, one on each of said legs, and a tapered key adapted to be seated between said abutments and a selected seat on the other of said members to lock the ends of said members together.

6. In a construction of the class described, in combination a plurality of mold forming members, a plurality of angular retaining `members arranged end to end in a geometric figure about sald mold forming members, a serles of seats near the ends or each of sald angular retaining members, a tie member slotted to it over` the ends of a pair of said angular retaining members and to engage a selected seat on one of said members, a pair of abutments integrally formed with said tie member and a tapered key adapted to be seated between said'abutments and a selected seat on the other of said pair of angular retaining members thereby locking the two ends of said angular retaining members together.

7. In a construction of the class described, in combination a plurality of mold forming members, a plurality of angular retaining members arranged end to end about said mold forming members, a series of seats on the outer edges of said angular retaining members, a tie member slotted to fit over the ends of twol adjacent angular members Aand to engage one of said seats on one of said angular retaining members, a pair of abutments integrally formed with said tie members, a tapered key to coperate with said abutments and one of said seats on an angular retaining member to directly crowd one angular member toward the other and to adjustably lock adjacent members together, a relatively large adjustment being permitted by selecting different seats and a relatively small adjustment being made by the further insertion of said tapered key.

In testimony whereof, I have signed my name to this specification.

eUs'rAv iSwanson., 

